首页|Correlation between structural phase transition and physical properties of Co2+/Gd3+co-substituted copper ferrite
Correlation between structural phase transition and physical properties of Co2+/Gd3+co-substituted copper ferrite
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The doping of the spinel ferrites with selective cations usually improves the properties of the parent ferrite.The effect of Co2+/Gd3+co-substitution on the microstructure,optical,and magnetic properties of Cu1-xCoxFe2-xGdxO4 prepared by the citrate-nitrate auto-combustion synthesis was investigated.Char-acterization of the samples was performed with powder X-ray diffraction(XRD),Raman and Fourier-transform infrared(FTIR)spectroscopy,field-emission scanning electron microscopy,X-ray energy-dispersive spectroscopy,UV-Vis spectroscopy,and a vibrating sample magnetometer.The results of XRD,Raman,and FTIR analysis show a gradual structural phase transition from a tetragonal(I41/amd)structure to a cubic(Fd(3-)m)structure.The bandgap energy of the studied samples is in a range of 1.57-1.75 eV with a minimum in sample x=0.06 and then increases.Magnetic investigations show that the presence of Co2+/Gd3+cations in an octahedral site of the copper ferrite structure could increase saturation magnetization and coercive field from 567.9 Oe and 23.62 emu/g to 929.4 Oe and 28.27 emu/g,respectively.
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